index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="styles.css">
    <title>Basic example</title>
</head>
<body>
    <canvas id="three-canvas"></canvas>
    <div id="loading">
        <div class="progress">
            <div class ="progressbar"></div>
        </div>
    </div>
    <script src="bundle.js"></script>
</body>
</html>